The Ingenieur Vol 59 July-Sept 2014 The Ingenieur Vo. 59, July-Sept 2014 | Page 35

The displacement measurements of the
bridge were observed at the top of pier and
the intermediate pier (Pier 3 was selected for
observation). In general, all types of bridge
models are still in a secure condition due to the
actual ground acceleration TR=500 (0.0555g)
and TR=2500 (0.10781g). To study the damage
level performance of the bridge, the actual ground
acceleration was scaled up to 30 times. Figures 8
to 10 show the serviceability performance of the
overall bridge based on the serviceability level at
Pier 3 for fix-based, rubber bearing pad and seismic

isolator bearing bridge models. The summary of
the results are:
i.
The fix-based model reaches damage
level (B) at 0.444g, IO level at 0.8325g
and LS level at 1.332g;
ii.
The rubber bearing pad model reaches
damage level (B) at 0.333g, IO level at
0.444g and LS level at 0.777g; and
iii.
The seismic isolator bearing model
reaches damage level (B) at 0.333g,
IO level at 0.4995g and LS level at
1.332g.

Figure 8a

Figure 8b

Figure 8c

Figure 8d

Figure 8: The performance of the bridge using fix-based bearing model analysis

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